Hi, I would like to be able to zoom during an animation using perspective projection. I am doing everything via a Python script. For parallel projection, the transformation is simple and one zooms just by changing a constant factor, i.e., setting the CameraParallelScale variable, and the camera doesn't 'move'.
In parallel projection, however, one needs to change the actual camera position and the transformation is not that simple. Looking at the Python trace after zooming with the middle button, ParaView just reports the new camera position, but not how it was calculated. Looking at vtk documentation, there is a class called vtkCamera, which can be zoomed simply, just using vtkCamera.Zoom(float), which supposedly zooms properly both in parallel and perspective projections, at least according to the documentation. What I can't figure out is how to call a renderer using the vtk module and create the vtkCamera for that renderer, i.e., there would be a RenderView object V of some sort, and we would just set V.vtkCamera.Zoom(float) However, there is no vtkRenderView or vtkView within the vtk Python classes provided by the module that comes with ParaView. Would someone be able to tell me what GetRenderView() in paraview acually calls? Or if I am headed in the wrong direction, how should this be done properly? I hope I don't have to code up all the transformations by hand to obtain the new camera position for parallel projection...Thanks, Milos -- Miloš Ilak Linné Flow Centre KTH Mechanics, Stockholm +46(0) 8 790-7152 www2.mech.kth.se/~ilak <http://www2.mech.kth.se/%7Eilak/>
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
